Romain, I don't understand how tasting it raw would be of any benefit whatsoever. You might as well get a handful of different spices like coriander seeds, cumin seeds, a couple of cloves and a green cardamom, a tej patta and a bit of cinnamon and start to munch on it. It will give you no indication at all about what would happen when you cook them. SS, the simple question is WHY?
Curry pastes, (and dry masalas) are made as a short cut to achieve a desired outcome "once you know what goes into it in the finished cooked dish that you want to replicate easily". I have a recipe for a Balti Paste that I've made several times. It is a combination of typical Balti spices blended together in a ratio that is known to work and set into some vinegar and oil to act as preservatives and enable convenient storage. There is no way that munching on some of it will tell me what the dish will taste like once I've cooked it. However. add some to a bit of oil and fry it, add some base gravy and whack in some pre-cooked chicken or lamb and you have a nice dish. Quick and easy.
I've also used it to save a few failed curries. Would I taste it raw? No way. I'm not afraid of poisoning myself but it is the same as eating some flour, salt, and baking powder and trying to predict the flavour of a cake.